In my own totally non-traditional and convenience-minded way, I lightly roasted some stale-ish light-roasted TKY in my toaster oven on the lowest baking setting for about 10 minutes. I made a pouch out of aluminum foil so the tea wouldn't get directly exposed to the heating element. Gave it a nice medium-roasted flavor and definitely revived tea I would otherwise have not enjoyed much. With this method, it would be very easy to go to high roast so I had to watch it really closely.

I might have overdone it a little, it's a very light oolong. But this totally brought back the sweet flowery taste that I missed. Although I liked the extra roasted taste I probably will do it a bit shorter next time.